http://sqlserver.ro/blogs/rosql/archive/2010/11/22/resizing-a-virtual-disk.aspxEvery time I needed to modify the size of a virtual machine disk, this step by step guide was very helpful: Paul's Point - Increase the size of your Microsoft Virtual PC hard disk . Maybe it will help you too!enCommunityServer 2.1 SP2 (Build: 61129.1)